div.promt {
    z-index: 17;
    position: fixed;
    top: 0; right: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.47);
}

div.promt form {
    width: 40%;
    height: 250px;
    background-color: #dee2eb;
    position: relative;
    margin-left: 30%;
    margin-top: 100px;
    border-radius: 10px;
    overflow: hidden;
}

div.promt form div.header {
    background-color: #16a085;
    height: 60px;
}

div.promt form div.header h2 {
    margin: 0;
    text-align: center;
    padding: 10px;
    color: white;
}

div.promt form div.body {
    height: 50px;
    width: 300px;
    margin: 10px auto;
    display: flex;;
}

div.promt form div.body label {
    flex: .3;
    font-size: 18px;
    line-height: 40px;
}

div.promt form div.body input {
    flex: .7;
}

div.promt form div.tail {
    width: 300px;
    margin: 0 auto;
    display: flex;
    align-content: center;
    justify-content: space-around;
}

div.promt form div.tail button{
    flex: .3;
}